已阅读5页,还剩16页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
CONTENTSIOVERVIEW1IIOPERATINGPRINCIPLE1IIIMAINTECHNICALPARAMETERS5IVINSTRUMENTPANEL5VOPERATINGINSTRUCTIONS7VICONNECTION91POSITIVECONNECTION92NEGATIVECONNECTION93CVTSELFEXCITATIONMEASUREMENT11VIIPRECAUTIONS15VIIIFULLSETOFINSTRUMENT16IXREFERENCECONNECTIONMETHOD17INTELLIGENTTGMETERIOVERVIEWINTELLIGENTTGMETERISAKINDOFINSTRUMENTWITHHIGHPRECISIONFULLYAUTOMATICMEASURINGTHEDIELECTRICLOSSTANGENTANDCAPACITANCEOFVARIOUSHIGHVOLTAGEELECTRICALEQUIPMENTSINTHEPOWERPLANTSANDSUBSTATIONSTHEADOPTIONOFFREQUENCYCONVERSIONTECHNOLOGYCOULDENSURETHEACCURATEMEASUREMENTINTHEINTERFERENCEOFSTRONGELECTRICFIELDTHEOPERATIONINSTRUCTIONOFTHEINSTRUMENTISCHINESETHEWHOLEPROCESSISMEASUREDAUTOMATICALLYTHROUGHMICROCOMPUTERTHEINSTRUMENTALSOAPPLIESTOTHEMEASUREMENTOFTGANDELECTRICALCAPACITYOFHIGHVOLTAGEELECTRICALEQUIPMENTSINTHEWORKSHOPS,LABORATORIESANDRESEARCHINSTITUTESITCOULDMEASURENONGROUNDEDORGROUNDEDHIGHVOLTAGEEQUIPMENTSADOPTINGPOSITIVEANDNEGATIVECONNECTIONMETHODBESIDES,ITCOULDMEASURETHETGOFCAPACITORVOLTAGETRANSFORMERANDCAPACITANCEOFMAINCAPACITORC1ANDC2THEINSTRUMENTISEQUIPPEDWITHHIGHVOLTAGESTEPUPTRANSFORMERBESIDES,ITTAKESSECURITYMEASURESLIKEZEROCROSSCLOSING,LIGHTNINGPROTECTION,ETCDURINGTHEEXPERIMENT,DIFFERENTLEVELSOFHIGHVOLTAGERANGINGFROM05KVTO10KVAREOUTPUTTEDTHEINSTRUMENTHASTHEADVANTAGESOFCONVENIENTANDSAFEOPERATIONUNDERTHECIRCUMSTANCEOFOILDIELECTRICLOSS001,WITHOILCUP,POSITIVEWIRINGCANBEUSEDTOMEASURETHEDIELECTRICLOSSOFOILTHISFOLLOWINGPROTECTIONFEATURESARENOTINCLUDEDINTHISINSTRUMENTHIGHVOLTAGESHORTCIRCUITPROTECTIONCVTOVERVOLTAGEPROTECTIONPOORGROUNDINGPROTECTIONIIOPERATINGPRINCIPLEUNDERTHEACVOLTAGE,THEDIELECTRICWOULDCONSUMEAPARTOFELECTRICALENERGYTHATWOULDBECONVERTEDTOHEATENERGYLEADINGTOLOSSTHISKINDOFENERGYLOSSISCALLEDTHEDIELECTRICLOSSWHENACVOLTAGEISAPPLIEDTOTHEDIELECTRIC,PHASEANGLEDIFFERENCEEXISTBETWEENTHEVOLTAGEANDCURRENTOFDIELECTRICTHEWHICHISTHECOMPLEMENTARYANGLEOFISTHEDIELECTRICLOSSANGLETHETGWHICHISTHETANGENTOFISDIELECTRICLOSSTANGENTTHEVALUEOFTGISTHEPARAMETERFORMEASURINGTHEDIELECTRICLOSSTHEMEASURINGCIRCUITOFTHEINSTRUMENTINCLUDESASTANDARDLOOPCNANDATESTEDLOOPISCXWHICHISSHOWNINFIGURE1STANDARDLOOPISCOMPOSEDOFBUILTINHIGHSTABLESTANDARDCAPACITORANDMEASUREMENTCIRCUITTHETESTEDLOOPISCOMPOSEDOFSPECIMENANDMEASUREMENTCIRCUITTHEMEASUREMENTCIRCUITISCOMPOSEDBYSAMPLINGRESISTANCE,PREAMPLIFIERANDA/DCONVERTERTHECURRENTAMPLITUDEANDPHASEOFSTANDARDLOOPANDTESTEDLOOPCANBEMEASUREDBYTHEMEASUREMENTCIRCUITANDBECOLLECTEDREALTIMEDIGITALLYBYSINGLECHIPCOMPUTERTHECAPACITANCEVALUEANDDIELECTRICLOSSTANGENTOFTHESPECIMENCOULDBEOBTAINEDTHROUGHVECTOROPERATIONANTIINTERFERENCEMEASURESAREADOPTEDBYTHEINSTRUMENTSOASTOMAKEACCURATEMEASUREMENTINTHEINTERFERENCEOFEXTERNALELECTRICFIELDFIGURE1SCHEMATICDIAGRAMOFMEASUREMENTPRINCIPLE电压控制VOLTAGECONTROL光耦OPTICALCOUPLERA/D转换极性判别IDENTIFICATIONOFA/DPOLARITYCONVERSION显示INDICATION打印PRINTINGCPU控制中心CPUCONTROLCENTER1STRUCTURE总电源MAINPOWER内高压允许INTERNALHIGHVOLTAGEALLOWABLE380V保护380VPROTECTION打印机PRINTER显示器INDICATOR按键BUTTON通讯COMMUNICATION控制面板CONTROLPANEL变频电源VARIABLEFREQUENCYPOWERSUPPLY升压变压器STEPUPTRANSFORMER内CNINTERNALCN通讯测量电路COMMUNICATIONMEASUREMENTCIRCUITCX反接线电流检测CXNEGATIVECONNECTIONCURRENTDETECTIONCX正接线电流检测CXPOSITIVECONNECTIONCURRENTDETECTION屏蔽SHIELD芯线CORE数字隔离通讯DIGITALISOLATIONCOMMUNICATION芯线屏蔽CORESHIELDING仪器结构框图BLOCKDIAGRAMOFINSTRUMENTSTRUCTUREMEASUREMENTCIRCUITFOURIERTRANSFORM,COMPLEXARITHMETIC,ANDALLOTHERCALCULATIONSANDRANGESWITCHING,VARIABLEFREQUENCYPOWERCONTROL,ETCCONTROLPANELPRINTER,KEYBOARD,INDICATORANDCOMMUNICATIONTRANSFERRINGVARIABLEFREQUENCYPOWERSUPPLYSPWMSWITCHINGCIRCUITISADOPTEDTOGENERATEANDOUTPUTHIGHPOWERSINEWAVESTABLEVOLTAGESTEPUPTRANSFORMERTHEOUTPUTOFVARIABLEFREQUENCYPOWERSUPPLYISSTEPPEDUPTOTHEMEASURINGVOLTAGETHEMAXIMUMREACTIVEPOWEROUTPUTIS2KVA/ONEMINUTESTANDARDCAPACITORINTERNALCNITISTHEMEASURINGBASISCNCURRENTDETECTIONITISUSEDTODETECTTHEINTERNALSTANDARDCAPACITORCURRENT,10A1ATHEINPUTRESISTANCEIS2CXPOSITIVECONNECTIONCURRENTDETECTIONITISONLYUSEDFORTHEMEASUREMENTOFPOSITIVECONNECTION,10A1ATHEINPUTRESISTANCEIS2CXNEGATIVECONNECTIONCURRENTDETECTIONITISONLYUSEDFORTHEMEASUREMENTOFNEGATIVECONNECTION,10A1ATHEINPUTRESISTANCEIS2NEGATIVECONNECTIONDIGITALISOLATIONCOMMUNICATIONPRECISIONMPPMDIGITALMODEMISADOPTEDTOTRANSMITTHECURRENTSIGNALOFNEGATIVECONNECTIONTOTHELOWVOLTAGESIDETHEISOLATIONVOLTAGEIS20KV2OPERATINGPRINCIPLEAFTERTHEMEASURINGISSTARTED,THEHIGHVOLTAGESETTINGVALUEWOULDBETRANSMITTEDTOTHEVARIABLEFREQUENCYPOWERSUPPLYTHATWOULDADJUSTTHEOUTPUTTOTHESETTINGVALUEBYTHEALGORITHMOFPIDTHEMEASUREMENTCIRCUITWOULDSENDTHEACTUALMEASUREDHIGHVOLTAGETOTHEVARIABLEFREQUENCYPOWER,FINELYADJUSTTHELOWVOLTAGEANDREALIZETHEACCURATEHIGHVOLTAGEOUTPUTACCORDINGTOTHESETTINGOFPOSITIVEANDNEGATIVECONNECTION,THEMEASUREMENTCIRCUITWOULDAUTOMATICSELECTTHEINPUTANDSWITCHTHERANGEBASEDONTESTINGCURRENTFOURIERTRANSFORMISADOPTEDFORFILTERINGOUTINTERFERENCESOASTOSEPARATETHEFUNDAMENTALWAVEOFSIGNAL,MAKEVECTOROPERATIONSOFTHESTANDARDCURRENTANDSPECIMENCURRENT,ANDCALCULATETHECAPACITANCEANDTHETGAFTERREPEATEDMEASUREMENTS,THEINTERMEDIATERESULTWOULDBESELECTEDAFTERTHECOMPLETIONOFMEASUREMENT,THEMEASUREMENTCIRCUITWOULDSENDSTEPDOWNINSTRUCTIONTOMAKETHEVOLTAGEOFVARIABLEFREQUENCYPOWERTOBEREDUCEDTO0SLOWLYIIIMAINTECHNICALPARAMETERS1HIGHVOLTAGEOUTPUT0510KVINCREASINGBY500VFOREACHLEVEL,ATOTALOF20LEVELS,CAPACITY1500VA2ACCURACYTGREADING15004CXREADING155PF3RESOLUTIONTG001CX1PF4MEASURINGRANGE01TG503PFCX60000PFWHENITIS10KV,CX30000PFWHENITIS5KV,CX60000PF5POWERSUPPLYAC220V10501HZ6HARMONICADAPTATION37APPLICATIONCONDITION1550RELATIVEHUMIDITY808DIMENSION460L335W340H9WEIGHT30KGIVINSTRUMENTPANEL1THEDIAGRAMFORCONTROLPANELFIGURE2ANDHIGHVOLTAGEBACKPLANEFIGURE3FIGURE2FIGURE3智能介损测试仪INTELLIGENTDIELECTRICLOSSTESTER(INTELLIGENTTGMETER)高压危险DANGERHIGHVOLTAGE正接线示意图DIAGRAMOFPOSITIVECONNECTION(DIAGRAMOFSTRAIGHTPOLARITY)反接线示意图DIAGRAMOFNEGATIVECONNECTION(DIAGRAMOFREVERSEPOLARITY)打印机PRINTER显示屏INDICATORCX试品输入CXSPECIMENINPUT(CXEUTINPUT)CVT电压CVTVOLTAGE内高压开关INTERNALHIGHVOLTAGESWITCH(KINETIXSWITCHEMERGENCEOFF)总电源开关MAINPOWERSWITCH电源输入POWERINPUT(PROTECTIVETUBE5AAV220V50HZ)退出ESC确认ENTER高压输出端HIGHVOLTAGEOUTPUTTERMINALCXSPECIMENINPUTTHESPECIMENCURRENTSHOULDBEINPUTTEDWHENITISPOSITIVECONNECTEDTHECOREREDCLIPSHOULDBECONNECTEDWITHLOWVOLTAGETERMINALOFSPECIMENWHENITISPOSITIVECONNECTEDIFTHESHIELDINGELECTRODEISAVAILABLEINTHELOWVOLTAGETERMINAL,THESHIELDEDCABLEBLACKCLIPCOULDBECONNECTEDOTHERWISE,ITCOULDBEHUNGWHENITISNEGATIVECONNECTION,CXSPECIMENINPUTWIRECOULDBEUNCONNECTEDORHUNGEARTHCONNECTIONMEASUREMENTITISCONNECTEDWITHTHESHELLINTHEPOSITIVEANDNEGATIVEMEASUREMENTS,THEINSTRUMENTCOULDBERELIABLYANDINDEPENDENTLYGROUNDEDTHEGROUNDINGCONDUCTORCANNOTBEPAINTEDORRUSTYITSHOULDBEWIPEDCLEANANDMAKESUREZERORESISTANCEGROUNDINGPOORGROUNDINGCOULDCAUSEERRORSORDATAFLUCTUATIONIFITISSEVERE,ITMAYCAUSEDANGERINTERNALHIGHVOLTAGEALLOWABLETURNINGONTHISSWITCH,HIGHVOLTAGEWOULDBEOUTPUTTEDTURNINGOFFTHESWITCH,HIGHVOLTAGEWILLNOTBEGENERATEDINTHEINNERANDWILLNOTBEOUTPUTTEDMAINPOWERSWITCHTURNINGONTHISSWITCHANDTHEINDICATORWOULDDISPLAYTHEMEASURINGCONTENTKEYBOARD“ESE“,“ENTER“,“”,“”“ESC“DENIALOFTHECONTENTWHERETHECURSORISLOCATEDORTHECONTENTHASBEENCOMPLETED“ENTER“ONCERECOGNITIONOFTHECONTENTWHERETHECURSORISLOCATED,YOUCANPRESSTHISKEYTOCONFIRMANDMOVETHECURSORTOOTHERPLACE“”,“”CHANGINGTHEVALUEORCHANGINGPPOSITIVECONNECTION,NNEGATIVECONNECTION,DDIFFERENTFREQUENCY,WWORKINGFREQUENCYANDOTHERCONTENTSINDICATORDISPLAYINDICATINGMENUS,MEASUREMENTINFORMATION,MEASUREMENTRESULTSSUNEXPOSUREFORLONGTIMESHOULDBEAVOIDEDBRIGHTNESSADJUSTMENTADJUSTINGTHECONTRASTDEGREEOFSCREENVOPERATINGINSTRUCTIONSTHEDIELECTRICLOSSOFHIGHVOLTAGEWINDINGFORLOWVOLTAGEWINDINGANDSHELLINTHEMEASUREMENTOFPOWERTRANSFORMERSISANEXAMPLETHENEGATIVECONNECTIONSHOULDBEADOPTEDSEETHEDIAGRAMOFNEGATIVECONNECTIONMETHODAFTERCHECKINGTHEPROPERCONNECTIONOFTHEINSTRUMENTWITHPOWERTRANSFORMER,DDIFFERENTFREQUENCYAND10KVVOLTAGESHOULDBESELECTEDFORMEASUREMENTANDTHEFOLLOWINGOPERATIONSSHOULDBEMADETURNONTHEMAINPOWERSWITCH,THEDISPLAYOFTHESCREENOFINSTRUMENTISSHOWNINFIGURE4FIGURE4STARTUPDISPLAYFIGURE5CONNECTINGMODEFIGURE6VOLTAGEMEASUREMENTPRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“MEASURINGMETHODW“,PRESSING“”,“”,ITCOULDBEADJUSTEDTO“MEASURINGMETHODD“,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“CONNECTIONMODE“WHICHMEASURINGMETHODWCONNECTINGMODEPMEASURINGVOLTAGE5KVSTARTTOMEASUREMEASURINGMETHODDCONNECTIONMODEPMEASURINGVOLTAGE5KVSTARTTOMEASUREMEASURINGMETHODDCONNECTIONMODENMEASURINGVOLTAGE10KVSTARTTOMEASUREISSHOWNINFIGURE5PRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“CONNECTIONMODEP“”,“”,ITCOULDBEADJUSTEDTO“CONNECTIONMODEN“,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“MEASURINGVOLTAGE“WHICHISSHOWNINFIGURE6PRESSINGTHE“ENTER“,THECURSORWOULDGOTOTHE“MEASURINGVOLTAGE05KV“,PRESSING“”,“”,THEVOLTAGECOULDBEADJUSTEDAMONG05,10,15,20,259510KV,PRESSING“ESC“,THECURSORWOULDGOTOTHEFIRSTLINE,ANDTHENPRESSING“”,ITWOULDBEMOVEDDOWNTOTHE“STARTTOMEASURE“WHICHISSHOWNINFIGURE7FIGURE7STARTTOMEASUREFIGURE8MEASURINGFIGURE9MEASUREMENTRESULTFIGURE10PRINTINGRESULTSTURNINGONTHE“HIGHVOLTAGEALLOWABLE“SWITCH,PRESSING“ENTER“,THEINSTRUMENTWOULDBEGINTOPRODUCEHIGHVOLTAGEOUTPUTACCOMPANIEDBYTHEHINTSOUNDOF“BEEP“,ATTHISTIME,THESCREENWOULDSHOW“ITISBEINGMEASURED,PLEASEWAIT“WHICHISSHOWNINFIGURE8AFTERABOUT40SECONDS,THEMEASUREMENTWOULDBECOMPLETEDTHEHIGHVOLTAGEWOULDBECUTOFFAUTOMATICALLYANDTHESCREENWOULDDISPLAYTHEMEASUREMENTRESULTS,WHICHISSHOWNINFIGURE9IFTHERESULTSNEEDTOBEPRINTEDOUT,YOUNEEDTOPRESS“ENTER“ITISSHOWNINFIGURE10INTHEBOOTSCREEN,PRESSINGTHE“ESC“THEN40SETSOFHISTORICALDATACOULDBECHECKEDVICONNECTIONPROPERCONNECTIONMETHODSHOULDBESELECTEDINACCORDANCEWITHTHEGROUNDINGOFTESTEDEQUIPMENT1PPOSITIVECONNECTIONIFTHELOWVOLTAGEMEASURINGTERMINALORSECONDARYPORTOFEQUIPMENTUNDERTESTISGROUNDINSULATED,POSITIVECONNECTIONSHOULDBEADOPTEDITISBEINGMEASURED,PLEASEWAITDIELECTRICLOSSTG042CAPACITANCE1000PMEASURINGMETHODDCONNECTIONMODENMEASURINGVOLTAGE10KVSTARTTOMEASUREFREQUENCYWCONNECTIONMODENVOLTAGE10KVDIELECTRICLOSSTG042CAPACITANCE1000PTHEREDSPECIALHIGHVOLTAGECABLESHOULDBELEDOUTFROMTHEHVXWHICHISONTHEBACKOFTHEINSTRUMENTTHEHIGHVOLTAGESHIELDEDCABLESHOULDBECONNECTEDWITHTHEHIGHVOLTAGETERMINALOFEQUIPMENTUNDERTESTTHEBLACKSPECIALLOWVOLTAGECABLESHOULDBELEDOUTFROMCXWHICHISONTHEPANELOFINSTRUMENTTHELOWVOLTAGECORESHOULDBECONNECTEDTOTHELOWVOLTAGETERMINALLOFEQUIPMENTUNDERTESTSEEFIGURE11THELOWVOLTAGESHIELDEDCABLESHOULDBECONNECTEDTOTHESHIELDINGTERMINALEOFEQUIPMENTUNDERTESTIFSHIELDINGTERMINALISUNAVAILABLE,THENITCOULDBEVACANTTHECORESOFHVXANDCXARENOTALLOWEDTOBESHORTENEDWITHTHESHIELDEDCABLEOTHERWISE,ITISIMPOSSIBLETOSAMPLINGANDTOMEASURE2NNEGATIVECONNECTIONIFTHELOWVOLTAGEMEASURINGTERMINALORSECONDARYPORTOFEQUIPMENTUNDERTESTISGROUNDEDDIRECTLY,NEGATIVECONNECTIONSHOULDBEADOPTEDTHEREDSPECIALHIGHVOLTAGECABLESHOULDBELEDOUTFROMTHEHVXWHICHISONTHEBACKOFTHEINSTRUMENTTHEHIGHVOLTAGECORESHOULDBECONNECTEDWITHTHEHIGHVOLTAGETERMINALOFEQUIPMENTUNDERTESTTHELOWVOLTAGETERMINALSHOULDBEGROUNDEDSEEFIGURE12ATTHISTIME,THEINPUTLINEOFCXISVACANTTHECOREOFHVXISNOTALLOWEDTOBESHORTENEDWITHTHESHIELDEDCABLEOTHERWISE,ITISIMPOSSIBLETOSAMPLINGANDTOMEASURE图11正接法图12反接法FIGURE11POSITIVECONNECTIONMETHOD正接线示意图DIAGRAMOFPOSITIVECONNECTION(DIAGRAMOFSTRAIGHTPOLARITY)测试仪METER高压线外屏蔽(黑)EXTERNALSHIELDINGOFHIGHVOLTAGELINEBLACK(HIGHVOLTAGECABLEBLACK)试品SPECIMEN(EUT)CX芯线CXCORE(CXRED)测量接地GROUNDMEASUREMENT(GROUND)FIGURE12NEGATIVECONNECTIONMETHOD反接线示意图DIAGRAMOFNEGATIVECONNECTION(DIAGRAMOFREVERSEPOLARITY)测试仪METER高压线芯线(红)COREOFHIGHVOLTAGELINERED(HIGHVOLTAGECABLERED)试品SPECIMEN(EUT)测量接地GROUNDMEASUREMENT(GROUND)3CVTSELFEXCITATIONMEASUREMENTTHEBUSISNOTGROUNDED,CONNECTIONMODEISCVKEYWIRINGDIAGRAMCVT测量C2接线示意图CVTMEASURINGC2CONNECTIONDIAGRAM测试仪TESTER高压线(屏蔽和芯线)HIGHVOLTAGELINESHIELDINGCABLEANDCORECX芯线CXCORE测量接地GROUNDMEASUREMENTCVT测量C1接线示意图CVTMEASURINGC1CONNECTIONDIAGRAM测试仪TESTER高压线(屏蔽和芯线)HIGHVOLTAGELINESHIELDINGCABLEANDCORECX芯线CXCORE测量接地GROUNDMEASUREMENTACTUALWIRINGDIAGRAM1MEASUREMENTC2THEWIRINGISSHOWNINFIGURE13ATHEENDOFJUNCTIONBOXISOPENEDTOTHEGROUNDANDTHESECONDARYWIRINGSAREVACANTRECORDSHOULDBEMADESOASTOMAKEITRESTOREDAFTERTHETESTINGBTURNINGONTHESWITCHESOFMAINPOWERSUPPLYANDINTERNALHIGHVOLTAGEALLOWABLEOFDIELECTRICLOSSTESTERCMOVINGTHECURSORTOTHE“CONNECTIONMODE“ANDPRESSING“ENTER“PRESSING“OR“,SELECTING“CV“ANDTHENPRESSING“ESC“DMOVINGTHECURSORTO“MEASUREVOLTAGE“ANDCHOOSING1KVANDPRESSING“ESC“MOVINGTHECURSORTO“STARTTOMEASURE“,PRESSING“ENTER“ANDWAITINGFORTHEDISPLAYOFRESULTSIFTHERESULTSNEEDTOBEPRINTEDOUT,PRESSING“ENTER“2MEASURINGC1THEWIRINGISSHOWNINFIGURE14THEBASICOPERATIONISTHESAMEASTHATOFMEASURINGC23NOTETHEC1ANDC2CANONLYBEMEASUREDUNDERTHETESTINGMODEOFCVTCVTWOULDBEDAMAGEDINTHEMETHODSOFPOSITIVECONNECTIONANDNEGATIVECONNECTION图13测C2FIGURE13MEASURINGC2芯线和屏蔽线接CVT高压端COREANDSHIELDINGCABLECONNECTEDTOCVTHIGHVOLTAGETERMINAL高压端HIGHVOLTAGE试品输入SPECIMENINPUT低端输入LOWVOLTAGEINPUTCVT介损测试仪CVTDIELECTRICLOSSTESTER芯线和屏蔽线COREANDSHIELDINGCABLE黑BLACK图14测C1FIGURE14MEASURINGC1芯线接CVT高压端CORECONNECTEDTOCVTHIGHVOLTAGETERMINAL屏蔽线悬空SHIELDINGCABLEISVACANT高压端HIGHVOLTAGE试品输入SPECIMENINPUT低端输入LOWVOLTAGEINPUTCVT介损测试仪CVTDIELECTRICLOSSTESTER芯线和屏蔽线COREANDSHIELDINGCABLE黑BLACKTHEHIGHVOLTAGELINESHOULDBESUSPENDEDWITHOUTCONTACTINGTHEGROUNDOTHERWISE,THEDIELECTRICLOSSOFHIGHVOLTAGELINETOTHEGROUNDWOULDCAUSEERRORTHINCABLESHOULDBEUSEDTOCONNECTHIGHVOLTAGEOUTLETWITHCVTSPECIMENANDSHOULDBEHUNGINADDITION,CONSIDERINGTHEVOLTAGEDIVISIONEFFECTOFSERIESOFC2ORC1WITHINTERNALC1,ITSCAPACITANCESHOULDBECALIBRATEDACCORDINGTOTHEFOLLOWINGFORMULAC1实际值C1ACTUALVALUEC2标称值C2NORMINALVALUEC1测量值C1MEASUREDVALUEC2实际值C2ACTUALVALUEC1标称值C1NORMINALVALUEC2测量值C2MEASUREDVALUECC,THEEMPIRICALVALUEFORCALIBRATION,INCLUDESTHEEFFECTOFCNANDHIGHVOLTAGELINEFOREARTHCAPACITANCEITSVALUECOULDBE110PF图15CVT结构原理示意图FIGURE15STRUCTUREDIAGRAMOFCVTPRINCIPLE接载波装置JOINTCARRIERDEVICE分压电容PARTIALPRESSURECAPACITOR放电间隙DISCHARGEGAP4THEWIRINGOFSPECIMENWITHSMALLCAPACITORFORSMALLCAPACITORS,WHENTHEAIRHUMIDITYISLARGE,THEMEASUREDVALUEOFDIELECTRICLOSSWOULDBEABNORMALANDUNSTABLEASITSTGISIMPACTEDBYTHESURFACESTATEATTHISTIME,THESHIELDINGRINGCOULDBEADOPTEDFORABSORBINGTHELEAKAGECURRENTONTHESURFACEOFTHESPECIMENTHESHIELDINGELECTRODEISGROUNDEDWHENPOSITIVECONNECTEDANDISCONNECTEDTOTHESHIELDINGLAYEROFCXWHENNEGATIVECONNECTEDTHISMETHODMAYCHANGETHEDISTRIBUTIONOFELECTRICFIELDINTHEINTERNALEQUIPMENTUNDERTESTANDTHENAFFECTTHETGBOTHTHESTANDARDCAPACITORANDSTANDARDDIELECTRICLOSSTESTERADOPTTHISKINDOFCONNECTIONMETHOD5THECONNECTIONMETHODOFSOMEEQUIPMENTCANREFERTOSECTIONIX“REFERENCEOFCONNECTIONMETHODS“VIIPRECAUTIONS1THEINSTRUMENTISONLYUSEDONPOWEROFFEQUIPMENTTHEGROUNDINGTERMINALSHOULDBECONNECTEDTOTHEGROUNDINGNETWORKRELIABLYTHEINSTRUMENTSHOULDBEUSEDINSPACIOUS,SAFEANDRELIABLEPLACE2THEEQUIPMENTUNDERTESTISSHIFTEDTOTHEMAINTENANCESTATEIFTHEHIGHVOLTAGELEADISDISCONNECTEDFROMOPERATIONSTATEANDCOULDBECLEANEDTHEINSTRUMENTCOULDBETESTEDONLYAFTERGOODINITIALINSULATIONTESTSOASTOAVOIDTHEPOORINSULATIONOFEQUIPMENTUNDERTESTCAUSINGTHEDAMAGEOFTHEINSTRUMENTDURINGTHEPRESSINGPROCESS3THECONNECTIONMODESHOULDBEBASEDONTHEINSTALLATIONOFEQUIPMENTCORRESPONDINGCONNECTIONMODESHOULDBESELECTEDINTHEMENUOPTION4THETESTINGVOLTAGELEVELSHOULDBESELECTEDACCORDINGTODIFFERENTEQUIPMENTANDTHEDESIREDVOLTAGESHOULDBESELECTEDINTHECORRESPONDINGMENUOPTION5UNDERTHESPECIALCIRCUMSTANCESOFENDANGERINGSAFETYDURINGTHETESTING,THEMAINPOWERSUPPLYCOULDBESWITCHEDOFF6THECONNECTIONMODECOULDBECHANGEDORTHEWORKISDONEAFTERTHEPOWERSWITCHONTHEPANELISSWITCHEDOFFANDTHE220VTESTPOWERISDISCONNECTEDIFTHEEQUIPMENTNEEDSTOBERETESTED,YOUCANPRESSTHE“RESET”ORSELECTREPEATAFTERTHECOMPLETIONOFPREVIOUSTESTING7INORDERTOENSURETHEMEASUREMENTACCURACY,ITISVITALTOGUARANTEETHEGOODINSULATIONOFLOWVOLTAGETERMINALORSECONDARYTERMINALOFTHEEQUIPMENTANDITSHOULDBETESTEDINTHEENVIRONMENTWITHLOWRELATIVEHUMIDITYESPECIALLYIFTHESMALLLOSSOFSPECIMENWITHSMALLCAPACITANCE8WHENMAKINGTHETESTINGOFSPECIMENWITHLARGECAPACITANCE,THEGROUNDINGOFTHEINSTRUMENTANDTHESPECIMENSHOULDNOTBEINTHESAMEPLACETOPREVENTTHEREVERSEBREAKDOWNVOLTAGEORTRAVELINGWAVESWHICHMAYAFFECTTHESAFETYOFTHEINSTRUMENT9THESTEPUPDEVICEISAVAILABLEINTHEINSTRUMENTITISNECESSARYTOBECAREFULABOUTTHEINSULATIONDISTANCEOFHIGHVOLTAGELEADANDPERSONNELSAFETY10THEINSTRUMENTMUSTBEGROUNDEDRELIABLYPOORGROUNDINGMAYCAUSEDANGER11AFTERTHESTARTINGOFTHEINSTRUMENT,EXCEPTINSPECIALCIRCUMSTANCES,THEPOWERISNOTALLOWEDTOBETURNEDOFFSUDDENLYTOAVOIDTHEOVERVOLTAGEWHICHMAYDESTROYTHEEQUIPMENT12ALTHOUGHTHEHVXSPECIALHIGHVOLTAGEWIREEQUIPPEDWITHTHEINSTRUMENTISMADEFACTORYINSPECTION,ITSTILLSHOULDBEFARAWAYFROMHUMANBEINGSANDLOWVOLTAGETESTLINEBOTHTHEHIGHVOLTAGECOREANDHIGHVOLTAGESHIELDINGCABLEARENOTALLOWEDTOBEGROUNDEDANDCONTACTWITHTHELOWPOTENTIALOFTHETESTINGCIRCUITTHECOREANDSHIELDINGCABLEOFCXINPUTLINEARENOTALLOWEDTOCONTACTWITHPARTWITHHIGHVOLTAGE13THEINSTRUMENTSHOULDBEPROTECTEDFROMTHEMOISTUREANDEXCESSIVEVIBRATION14THEDIFFERENTFREQUENCYSHOULDBEADOPTEDFORMEASURINGIFTHERESULTCANNOTBEENTEREDMEASUREDBYWORKINGFREQUENCYWITHTOOMUCHINTERFERENCESOTHERWISE,WORKINGFREQUENCYSHOULDBEUSEDFORTHEMEASUREMENT15IFTHEMEASUREMENTRESULTCANNOTBESHOWNLONGTIME1MINAFTERSENDINGOUTTHEMEASUREMENTINSTRUCTION,ITMAYBECAUSEDBYLARGECAPACITANCEOFTHESPECIMENORCRASHINGOFTHEINSTRUMENTYOUNEEDTORESTARTTHEINSTRUMENT,REDUCETHEMEASUREMENTVOLTAGEANDMAKEMEASUREMENT16THEINSTRUMENTHASAUTOMATICPROTECTIONFEATUREIFITHASSHORTCIRCUIT17IFTHEPAPERISEXTENDEDOUTFROMTHEPAPERESCONTHETOPOFTHEPRINTER,YOUNEEDTOPRESSTHEBUTTONTOSTOPITTHEPRINTINGPAPERCOULDBEPULLEDOUTVIIIFULLSETOFINSTRUMENT1HOST12HIGHVOLTAGEHVXTESTCABLERED13CXSPECIFICTESTCABLEBLACK14LOWVOLTAGEOUTPUTTESTCABLEFORCVT,DUALCORE15220VPOWERLINE16GROUNDWIRE17INSTRUCTIONMANUAL18FACTORYCERTIFICATION19FUSE,PRINTINGPAPERFORSPARE10FACTORYINSPECTIONREPORT1IXREFERENCECONNECTIONMETHOD1VOLTAGETRANSFORMER(1)PRIMARYSIDETOSECONDARYSIDEASEEFIGURE6BVOLTAGE2KVCPOSITIVECONNECTION(2)PRIMARYSIDETOSECONDARYSIDEANDGROUNDASEEFIGURE7BVOLTAGE2KVCNEGATIVECONNECTION(3)SECONDARYSIDETOPRIMARYSIDEANDGROUNDASEEFIGURE8BVOLTAGE2KVCNEGATIVECONNECTION2CURRENTTRANSFORMER(1)PRIMARYSIDETOSECONDARYSIDEASEEFIGURE9BVOLTAGE10KVCPOSITIVECONNECTION(2)PRIMARYSIDETOENDSHIELDASEEFIGURE9CORECONNECTTOENDSHIELDBVOLTAGE10KVCPOSITIVECONNECTION(3)PRIMARYSIDETOSECONDARYSIDEANDGROUNDASEEFIGURE10BVOLTAGE10KVFIGU
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 2024年公务员(国考)之行政职业能力测验真题汇编附完整答案(名校卷)
- 氯金酸项目可行性报告
- 健康保健服务项目可行性报告
- 2024年大学计算机考试题库800道及参考答案(轻巧夺冠)
- 2024年大学计算机考试题库800道附参考答案【综合卷】
- 2024年普法学法知识竞赛题库含答案【轻巧夺冠】
- 江苏省南京市六校联合体2023-2024学年高二下学期4月联考英语试题
- 陕西省西安市第五十中学高三数学理上学期摸底试题含解析
- 2024年电工证《低压电工实操》考试题库及一套参考答案
- 柔印直接制版机项目可行性报告
- 艺术中国智慧树知到期末考试答案2024年
- 可持续建筑技术B智慧树知到期末考试答案2024年
- 课堂-可以这么有声有色
- 《人力资源管理概论(第5版)》课后思考题答案人大版
- (2023年)医疗机构工作人员廉洁从业九项准则
- 个人健康体检表(最新整理)
- 初中英语试卷答题卡模板[共2页]
- 人事档案专用密封条
- 小升初个人简历模板
- 闸基渗流计算(无桩)
- 材料进场验收单
评论
0/150
提交评论